Take-down pocket-knife.



U. H. WHITE (in R. A. LETT:

, TAKE-DOWN POCKET KNIFE.

APPLICATION FILED AUG. 15, 1910,

Patsnted June 6/1911.

UNITED STATES, PATENT onnion.

CARL H. WHITE AND ROYAL A. LEFT, 0]? DENVER, COLSRADO, ASSIGNORS, BYDIRECT AND MESNE ASSIGNMENTS, TO THE PIOGBAM SALES COMPANY, OF DENVER,COLO- BADO, A CORPORATION OF COLORADO.

TAKE- DOWN POCKET-KNIFE.

To all whom it may concern:

Be it knownthat we, CARL H. WHITE and ROYAL A. Law, citizens of theUnited States, residing in the city and county of Denver and State ofColorado, have invented certain new and useful Improvements in Take-Down Pocket-Knives; and we do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it apertains to make and use the same,reference heing'had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

' Our invention relates to improvements in 1 take-down pocket knives.

In our improved construction the blade or blades are removable from thehandle without removing the pivot pin. For the purpose of securing theblade in place, a sort of dog is employed, which cooperates with thepeculiar construction of the shank of the blade to form a'bearingentirely surrounding the retaining pivot.

In our improved construction the shank of the blade is provided with aslot which .opens at the inner extremity of the blade,

7 the width of the slot being such as to receive the pivot, and thedirection of the slot being at an angle to the length of the blade, andconsequently at an angle to the direction of the force applied to theblade by the main spring of; the handle; and by virtue of thisconstruction. the blade will be retained in place when in the wide-openposition, without the employment of the cooperating dog heretoforementioned.

Having'brieliy outlined our improved construction, we will proceed todescribe the same in detail, reference being made to the accompanyingdrawing in which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a view of a knife equipped with ourimprovements, one side of the handle being removed, the

" rivet pins bein shown in cross section and the blades in the wide-openposition. Fig.

2 is a similar view with the blades, however, in different positions.Fig. 3 1s a fragmentary view of the knife with the parts shown on alarger scale, the retainin dog being omitted, and the blade being s iownin the wide-open position. Fig. 4 is a similar View,

Specification of Letters Patent.

Application filed August 15, 1910.

Patented June 6,1911. Serial No. 577,286. 1

the blade, however, being shown in two positions, the wide-open positionbeing indicated by dotted lines, and a position approaching the rightangle position being shown in full lines. In this View the retaining dogis shown in place, but unlocked, the blade being in position to beremoved from the handle. Fig. 5 is a similar view showing the blade intwo positions different from those shown in Fig. 4:. Fig. 6 is a sideelevation of the retaining dog.

The same reference characters indicate the same parts in all the views.Let the numeral 5 designate the handle of the knife considered in itsentirety, the main spring being designated by the numeral (3, and thesides of the handle by the numeral 7. The spring is held in place by acentrally located rivet 8, while each extremity of the handle isequipped with a. rivet pin 1, forming the retaining pivot for the blade.The shank of the blade is provided with an open slot 9 extending at anangle to the length of the blade and also at an angle to the face 10 ofthe shank of the blade, upon which the extremity 12 of the spring bears.

\Vh'en the blade is in the wide-open position,

the dosed-extremity of the slot 9 is uppermost, whereby the pressure ofthe spring serves to retain the blade in place, since it.

could only be removed, without changing its position, by pressing theengaging extremity of the main spring outwardly a considerable distance.W hen, however,'it is desired to remove the blade, it is turned toaposition forming a considerable a hgle with the handle, the bladeapproaching a position forming right angles with the handle (see Fig.1). When this is done the blade is so arranged that the. pressure of thespring upon the shank thereof is in such a direction as to automaticallyeject the blade from the handle, assuming that the retaining dog is notemployed or that it is in the unlocked position.

The retaining dog, which we w ill designate in its entirety by thenumeral 13, is composed of a body part 14 adapted to fit the shank ofthe blade and give to the latter an approximately rectangular shape.This body part is provided witha projection 15 adapted to enter the slot9 of the shank of the blade, and is provided with a curved re cess toshaped to fit the pivot pin 4 of theblade, thus forming a half bearingfor the pin, the other half of the pin bearing being 1n the slot itself,whose inner extre1nity is rounded to fit the pin.

Projecting forwardly from the body of the. dog is a relatively narrowspring n1em-.

, ber or tongue 17 having a tooth 1.8 at its outer extremity adapted toenter a counterpart recess 19- forrne'din the shank of the blade,forward of .the pivot pin bearing. This tongue is normally'bowedupwardly as shownat 20 and when inits normal position its tooth 18 restsupon the edge of. the

blade shank just-in the rear of the recess I 19'. However, by pressinginwardly upon the 'bowed part of the spring tongue, the lat ter will beelongated in the direction of the v. blade sufliciently to' cause thetooth ,18 to 'enter the recess 19, whereby the dog Will .be locked inposition upon the blade until the tooth is disengaged from its recessmanually. Hence when the tongue isin'the locked position it virtuallyfonns a part of the blade shank and the two connected or companion partsof the shank form a complete bearing surrounding the pivot pin of theblade. I

In order to insert a blade in the'handle,

the blade is placed in-a' osition at righta'nglesto the handle as'inicated by dotted lines in Fig. 5. It .is then moved into the sition andthefconstrnction willvthen con-j form tojthe illustration in Fig.3,assuming 4 handle extremity, whereby the pin 4 is placed in positionwithin the slot of the;

shank; a' small part- 21 of the shank engaging the outer extremity ofthesp'ring. The blade is -then moved outwardly turning on its pivotuntil it reaches the wide-open pothat one 30f the handle members isremoved.

' The knife is then laid upon its back, so to position"; the blade-isclosed and as it approaches the closing position the bow-shaped speak,or with theedge where the main spring is located lowermost, and the dogis dropped into place. In this event the position .of the dog withrelation to the blade will be as illustrated in full lines'in Figs.'

4 and 5. With the knife still in the same part of the spring tongue 17will engage the main spring-of the-handle, which..w1ll

act on the tongue to cause'its bowed portionto spring inwardly towardthe shank of the blade, whereby the tongue will .be elongatedsutfi'ciently to cause itstooth to slip into. the recess 19, whereby'thedog will be locked in lace. Now if it is desired'to remove a blac e, thesame will first be thrown to the wide-open position, after which the Qouter extremity of the tongue will be forced outwardly from the edge oftheshank ofthe blade until the tooth is disengaged from its recess; Thedog will then be loose, but the blade will be retained in place as long'as it isin the wide-open position, since the form a-bearin'g forthehaving aforwardly pro ecting spring arm .a toot force of the springacting thereon will be enertcd approximately in the direction indicatedby the. dotted line 92 in Fig. -3.

Now if it is desired to remove the blade,"

thelatt'er. will be moved toward the closing posltlon until it reachesapproximately the position shown in Fig. 4, being slightly re-.'

moved from the right angle position. In

this event the powciyof-the spring is excited in, a direction lengthwisewith the slot or recess 9, and the blade will be auto-.

ni'atically ejected by the spring;

Hav ng thus dcscrib'ed'our invention what we claim 1s:

1. A knife composed of a handle, a' main spring, the handle beingequipped with a pivot: pin in the end thereof,- a blade. hav-' ing aslot atthe extremity of the shank, open to receive the pivot pin, the.recess being elongated in the direction of a line forming an angle withthe length of the blade,

and a locking dog having a projection adapted to enter the recess of thebladekand forming in conjunction with the latter a bearing for "the pin,the said dog havin a forwardly projecting spring armprovi ed with atooth at its outer extremity adapted to enter a recess formed in theblade, the spring arm being normally bowed to prevent its-tooth fromentering the recess, but,

adapted when pressure 'is applied jto its bowed portion inwardly towardthe blade,

to be elongated. suiliciently tooause'its toot-h" to enter the recess ofthe blade, whereby the dog islocked in place. v

2. A knife composed of a handle, a main spring, a blade. having an openslot' in its s ank, to receive the pivot pin carried by the handle, thlength of the slot being in clined. to the length of the blade, and acooperatinglocking dog applied to the shank and having a projectionentering the slot .of the shank and cooperating with the latter to pivotpin, the 'dog provided with a tooth. adapted to enter a wardl projectingspring arm pl'bvi ed with hadapted to enter the recess formed in theblade when the-spring arm is placed under tension, substantially'asdescribed;

a pivot pin fast, in t e slot of the blade, the dogvalso havin a fori 4.A knife composed of a handle having ivot in, a blade hava main spring anto receive the ing an open slot a apte pivot pin, the slot extending a."direction llltlllllltl to the length of the blade, wherewvith adetachable dog cooperatingwith the by when the blade is in the Wide-openpoblade to form a bearing; for the pivot pin; sition the action of thespring serves to the dog having a spring" arm provided with retain theblade in place, and a locking dog :1 tooth adapted to interloek with theslot applied to the pivoted extremity of the blade formed in the bladewhen the. said arm is and having a projection adapted to enter theplaced under tension, substantially deslot of the latter, the dog alsohaving a forscribed.

wardly projecting spring tongue provided In testimony whereof we aflixour signawith a tooth adapted to be forced into a tures in presence oftwo witnesses. 1 counter )art recess formed in the bltde when ,Y

O 1 1 CARL H. MUTE. the springtongue 1s placed under tension, 1 r

V tOXAL A. LIJLT. substant ally as described.

A knife composed of a handle having \VH'IIQSSBSZ a nnun spring and apivot'pln for the A. J. OBRIEN, 15 blade, and a blade provided with aslot and F. E. Bowrmx It is hereby eertified that the name of theassigneevin lletters Patent No. 994.226, granted June 6, 1911, upon theapplication of Carl H. \Yhite and Royal A. Lett, 0f Denver, Color-ad foran improvement in Take-Down Pocket-Knives, was erroneously Written andprinted as "he Piogram Sales Company Whereas said name should have, beenwritten and printed The fiagran Sate Company; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Otfiee.

Signed and Sealed this 1st day of August, A. D., 1911. p I SEAL E. B.MOORE,

00mm 5mm; 01' of Patents.

llltlllllltl to the length of the blade, wherewvith a detachable dogcooperatingwith the by when the blade is in the Wide-open poblade toform a bearing; for the pivot pin; sition the action of the springserves to the dog having a spring" arm provided with retain the blade inplace, and a locking dog :1 tooth adapted to interloek with the slotapplied to the pivoted extremity of the blade formed in the blade whenthe. said arm is and having a projection adapted to enter the placedunder tension, substantially deslot of the latter, the dog also having aforscribed.

wardly projecting spring tongue provided In testimony whereof we aflixour signawith a tooth adapted to be forced into a tures in presence oftwo witnesses. 1 counter )art recess formed in the bltde when ,Y

O 1 1 CARL H. MUTE. the springtongue 1s placed under tension, 1 r

V tOXAL A. LIJLT. substant ally as described.

A knife composed of a handle having \VH'IIQSSBSZ a nnun spring and apivot'pln for the A. J. OBRIEN, 15 blade, and a blade provided with aslot and F. E. Bowrmx It is hereby eertified that the name of theassigneevin lletters Patent No. 994.226, granted June 6, 1911, upon theapplication of Carl H. \Yhite and Royal A. Lett, 0f Denver, Color-ad foran improvement in Take-Down Pocket-Knives, was erroneously Written andprinted as "he Piogram Sales Company Whereas said name should have, beenwritten and printed The fiagran Sate Company; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Otfiee.

Signed and Sealed this 1st day of August, A. D., 1911. p I SEAL E. B.MOORE,

00mm 5mm; 01' of Patents.

It hereby rel-rifled that the name of the assignee in Letters Patent No.994326,

granted June 6, Hill, upon the uppliration of Carl H. White and Royal A.Lott, of

Denver, (qloizuim for an improvement in Take-Down Pocket-Knives, was

whereas said erroneously written and printed as "he Piogmm Sales Companyname sholild have been written and printed The Iivgmn Sales C mpany; andthat the said Letters Patent should he reml with this correction thereinthat the same may conform to the record of the ease in the PatentOlrice.

Signed mid sealed this 1st day of August, A. 1 1911.

ISEAL.) E. B. MOORE Cum missionaof l Wants.

